The events that reshape ecosystems can be infrequent and often unpredictable.
Major droughts, hurricanes, the arrival of a new species, or a shift in ocean currents can dramatically affect the way an ecosystem looks and functions. Legacies from past events can cause two sites that look superficially similar to behave in very different ways.
Yet most ecological studies are funded just a few years at a time.
In 1980, the National Science Foundation funded the first Long-Term Ecological Research (LTER) sites to provide a longer view.
Today, research programs at 27 LTER sites support ecological discovery on the influence of long-term and large-scale phenomenon.
LTER sites also serve the wider ecological community by:
Making almost 40 years of sustained observations publicly available
Developing and maintaining large-scale experiments, which provide starting conditions for process-level studies, help to parameterize and test model, and spur cross-site synthesis
Providing long-term context and deep knowledge of place for researchers working on shorter-term projects
Training hundreds of graduate students in interdisciplinary and collaborative team science
LTER sites are the core of the network
Each LTER site involves dozens of researchers, typically including microbial, community, and landscape ecologists, but also hydrologists, geochemists, social scientists, economists and even the occasional artist, historian, or philosopher.
The shared knowledge of place offers unusual common ground for exploring disciplinary intersections.
Education and outreach helps LTER science make an impact
The longer tenure of LTER sites also makes them particularly well-suited to developing the relationships needed to engage with stakeholders, educators, and the public.
All LTER sites have an education and outreach component, although the exact nature of the program varies by site. Remote forested sites may deal mainly with foresters and landowners, while urban sites may more closely engage community residents.
Data, especially data management, play a crucial role
The value of LTER’s long-term data resource is immense and LTER data managers have been leaders in the movement to ensure that ecological data is accessible and usable.
Dedicated information managers document and archive LTER data in public repositories so that they can be re-used by the broader scientific community.
The Environmental Data Initiative (EDI) is LTER’s primary data repository and has a strong record of serving FAIR (Findable, Accessible, Interoperable, and Reproducible) data. Occasionally, LTER datasets reside in disciplinary- or geographically-focused repositories and EDI maintains metadata referencing the full dataset.
Network Vision, Mission, & Goals
Vision
LTER envisions a society in which exemplary science contributes to the advancement of the health, productivity, and welfare of the global environment that, in turn, advances the health, prosperity, welfare, and security of our nation.
Thus, LTER’s mission is to provide the scientific community, policy makers, and society with the knowledge and predictive understanding necessary to conserve, protect, and manage the nation’s ecosystems, their biodiversity, and the services they provide.
Mission
The LTER Network was founded in 1980 by the National Science Foundation with the recognition that long-term research could help unravel the principles and processes of ecological science, which frequently involves long-lived species, legacy influences, and rare events. As policymakers and resource managers strive to incorporate reliable science in their decision making, the LTER Network works to generate and share useful and usable information.
Goals
Understanding
To understand a diverse array of ecosystems at multiple spatial and temporal scales.
Synthesis
To create general knowledge through long-term, interdisciplinary research, synthesis of information, and development of theory.
Outreach
To reach out to the broader scientific community, natural resource managers, policymakers, and the general public by providing decision support, information, recommendations, and the knowledge and capability to address complex environmental challenges.
Education
To promote training, teaching, and learning about long-term ecological research and the Earth’s ecosystems, and to educate a new generation of scientists.
Information
To inform the LTER and broader scientific community by creating well-designed and well-documented databases.
Legacies
To create a legacy of well-designed and documented long-term observations, experiments, and archives of samples and specimens for future generations.
Core Themes
Five core research themes have been central to LTER Network science from the conception of the Network. Research in these core areas requires the involvement of many scientific disciplines, over long time spans and broad geographic scales. Data on the core areas are collected to establish and understand the existing conditions in an ecosystem before any experimental manipulation is begun.
The common focus on core areas facilitates comparison among and across sites in the Network.
Primary Production – Plant growth in most ecosystems forms the base or “primary” component of the food web. The amount and type of plant growth in an ecosystem helps to determine the amount and kind of animals (or “secondary” productivity) that can survive there. Read LTER research stories related to primary production.
Population Studies – Populations of plants, animals, and microbes change in space and time, moving resources and restructuring ecological systems. Read LTER research stories related to population studies.
Movement of Organic Matter – An entire ecosystem relies on the recycling of organic matter (and the nutrients it contains), including dead plants, animals, and other organisms. Decomposition of organic matter and its movement through the ecosystem is an important component of the food web. Read LTER research stories related to organic matter movement.
Movement of Inorganic Matter – Nitrogen, phosphorus, and other mineral nutrients are cycled through the ecosystem by way of decay and disturbances such as fire and flood. In excessive quantities nitrogen and other nutrients can have far-reaching and harmful effects on the environment. Read LTER research stories related to mineral cycling.
Disturbance Patterns – Disturbances often shape ecosystems by periodically reorganizing structure, allowing for significant changes in plant and animal populations and communities. Read LTER research stories related to disturbance patterns.
Two additional themes emerged with the addition of urban LTER sites, but it has become clear that they are also relevant for the rest of the Network:
Land Use and Land Cover Change: examine the human impact on land use and land-cover change in urban systems and relate these effects to ecosystem dynamics. Read LTER research stories related to land use and land cover change.
Human-Environment Interactions: monitor the effects of human-environmental interactions in urban systems, develop appropriate tools (such as GIS) for data collection and analysis of socio-economic and ecosystem data, and develop integrated approaches to linking human and natural systems in an urban ecosystem environment. Read LTER research stories related to human-environment interactions.
Well into its fourth decade, the LTER’s long-term experiments continue to reveal cutting edge ecological processes only gleaned through long-term study.
We can’t wait to see what the next forty years bring.
Recent Stories
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Microbes respond quickly to fluctuating salt marsh conditions
The ebb and flow of the tide through coastal salt marshes brings wide swings in temperature, salinity, oxygen levels and pH. Many of these fluctuations occur at short timescales (e.g. multiple times per day) and have a profound impact on both the types of microorganisms that can exist in such a dynamic environment, and how……
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A tale of two forests: exploring forest management in the Pacific Northwest
“Social forestry” describes the hybrid system of bottom-up grassroots oversight by local stakeholders and top-down, science-informed policy from larger governing bodies to determine forest management practices. Social scientists from the University of Freiburg in Germany and the University of Oregon analyzed the implementation of social forestry through a comparative case study of two National Forests……
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Harvard Forest Director receives Book Award in Environmental Science
Published in 2017, A Meeting of Land and Sea synthesizes twenty years of research in combination with over 300 color photographs, maps, and charts to explore the history, ecology and conservation of Martha’s Vineyard.
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Harvard Forest Director receives Book Award in Environmental Science
At its annual Prose Awards luncheon on February 8 in Washington D.C., the American Association of Publishers announced that A Meeting of Land and Sea. Nature and the Future of Martha’s Vineyard had been awarded the 2018 prize for Environmental Science. The PROSE Awards annually recognize the very best in professional and scholarly publishing by……
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2018 LTER Synthesis Webinar Series
The LTER Network Communications Office developed this monthly webinar series to keep investigators across the community apprised of new developments from the LTER synthesis groups. Webinars are hosted by the LTER Network Communications Office and the National Center for Ecological Analysis and Synthesis (NCEAS). Each of the speakers will discuss the opportunity they perceived to……